CN100584090C

CN100584090C - Cell switching method and device

Info

Publication number: CN100584090C
Application number: CN200610086785A
Authority: CN
Inventors: 朱伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-06-26
Filing date: 2006-06-26
Publication date: 2010-01-20
Anticipated expiration: 2026-06-26
Also published as: CN101001456A

Abstract

This invention relates to a local area switch method and a device including: a UE sets up service at AP, which measures signal strength of each macro-area existing in the geographical region where AP locates and selects a macro-area meeting the requirement as the target macro-area switched by said AP, when the AP signal strength of the place UE situates is lower than the preset threshold value, the service connection of the UE is switched to said target macro-region from said AP area, which determines the switched macro-area measured by AP in advance, when the AP signal reduces to the set threshold value, a blind switch is triggered timely to ensure success of the switch and connection and quality of user service.

Description

A kind of cell switching method and device

Technical field

The present invention relates to the mobile communication technology field, relate in particular to a kind of cell switching method and device.

Background technology

Operator is the existing Internet resources of better utilization; the cost of protecting network equipment operator; with provide at a high speed, access network easily, just in wireless network, introduce UMTS (universal mobile telecommunications system) AP-AG (access point-IAD) equipment as shown in Figure 1.Wherein, described AP inserts UMTS by described AG control.The covering diameter of the effective extended wireless network of the access of described AP makes prior wireless network can insert more wireless high-speed data user, thereby reduces the impact of high-speed data service to the mobile network greatly.

Usually, AP is deployed in place, user residence, and therefore, the macrocell at AP sub-district and place, AP position forms same covering relation, and the position of described AP sub-district and macrocell relation and uncertain.As shown in Figure 2, the AP sub-district may be in the central area of its place macrocell, also may be in fringe region.When customer service was set up, when leaving the AP sub-district at its place as if this user, then this customer service need switch to corresponding macrocell from AP sub-district, its place.For guaranteeing the user's communication quality of service, need to select the switching target small area of suitable macrocell as described AP sub-district, could initiate afterwards to switch.In Fig. 2, AP2 should select macrocell 1 as switching target small area; If AP2 as switching target small area, will cause handoff failure with macrocell 2 so.

Prior art is at the switching to macrocell proposes two kinds of schemes from the AP sub-district.

(1) first kind of scheme is in geographic area, AP place, gives a plurality of macrocells of AP cell configuration as macrocell.When the user leaves the AP sub-district at its place, this AP cell signal will weaken, and at this moment, UE (subscriber equipment) begins to measure the signal strength signal intensity of adjacent macro cell, and measurement result is reported the professional corresponding AP with this UE.Described AP selects the strongest macrocell of signal as the Target cell that switches according to the described measurement result that receives.

The problem that this embodiment exists comprises:

Because the transmitting power of AP is less usually, the influence of oneself factors such as limited coverage area, therefore, because the interference of objects such as building construction makes the user after going out, signal attenuation is very fast.If just initiate this moment to measure, then appear at possibly also not finish and just measure the phenomenon of call drop.

(2) second kinds of schemes mainly are by certain assign macro sub-district is disposed to AP as blind switching cell.When the user leaves AP sub-district, its place, when the AP signal weakening arrives to a certain degree, then trigger blind switching, directly customer service is switched to the macrocell of pre-configured this AP of giving from AP sub-district, place, and do not need measuring process through UE.

The problem that this implementation exists comprises:

(1) be that the pre-configured blind switching cell of each AP exists certain difficulty;

The coverage of a common macrocell is not very big, the address that the attendant only fills in according to the user is difficult to know this place, user address macrocell, especially work as the customer service personnel and breaking away from maintenance console, in the time of in the face of the client, with regard to more impossible timely understanding relevant information.And AP belongs to ustomer premises access equipment, and its quantity is huge, and therefore, one of difficulty that this scheme realizes need to be operator to give each AP pre-configured blind switching cell.

(2) comparatively difficult at the maintenance that is the pre-configured blind switching cell of each AP;

Regular meeting of operator carries out the network optimization to macrocell; to adjust the coverage of macrocell; these operation natures can be to impacting to the switching of macrocell with being adjusted the AP sub-district that macrocell is associated, and makes that originally the suitable blind switching target macrocell for the AP configuration also may be because the variation of this macrocell coverage area no longer be suitable for this AP.With AP3 among Fig. 2 is example, and described AP3 is former to be in the macrocell 1, after the network optimization, the pilot signal of macrocell 1 weakens, and the pilot signal of macrocell 2 strengthens, and AP3 will be arranged in macrocell 2 so, and the blind switching cell of AP3 should correspondingly be re-set as macrocell 2 by macrocell 1.As seen, another difficulty that this scheme realizes need to be operator on network operation, comprise the blind switching cell of AP is carried out data configuration again and drops into too much manpower and materials, and this obviously runs counter to operator's wish.

Summary of the invention

The present invention aims to provide a kind of cell switching method and device, thereby reduces the difficulty of AP data configuration, and guarantees promptness and the success rate switched to the macrocell of correspondence from the AP sub-district, thereby guarantees the connectivity of customer service.

Purpose of the present invention is achieved through the following technical solutions.

The invention provides a kind of cell switching method, comprising:

A, user equipment (UE) set up professional at access point AP, described AP measures the signal strength signal intensity of each macrocell of existing in this geographic area, AP place by UE, and the target macro sub-district of selecting the strongest macrocell of signal strength signal intensity to switch as this AP;

B, when the on-site AP signal strength signal intensity of this UE is lower than the threshold value that sets in advance, the business of this UE connected from the AP sub-district of this AP correspondence switch to described target macro sub-district.

Described steps A specifically comprises:

A1, set up professional for the first time at access point AP when user equipment (UE), described AP measures the signal strength signal intensity of each macrocell of existing in this geographic area, AP place by UE, and the candidate's macrocell when selecting the macrocell of the strongest predetermined number of signal to switch as this AP;

A2, when described UE sets up business at every turn, described AP measures the signal strength signal intensity of described candidate's macrocell by UE, the target macro sub-district of selecting macrocell that wherein signal is the strongest to switch as this AP.

Before execution in step A1, comprise:

Geographic area, place when disposing according to this AP in advance, select the geographic area, place of this AP correspondence in the corresponding access gateway AG maintenance system, and the macrocell that is formed the geographic area, place of this AP correspondence in the AG maintenance system by each macrocell identity information that comprises in the geographic area, place of described AG with this AP correspondence in the AG maintenance system is tabulated, and the tabulation of this macrocell sent to described AP, preserve by this AP, described identity information comprises scrambling code information, and each macrocell scrambler is different.

Described steps A 1 specifically comprises:

A11, described AP and described UE connect and described macrocell tabulation are handed down to described UE, and successively the signal strength signal intensity of each macrocell in this macrocell tabulation is measured by this UE, and measurement result is reported described AP, and execution in step A12;

After A12, described AP receive the measurement result of described UE, non-vanishing macrocell identity information of signal strength signal intensity and corresponding signal strength information in the record measurement result, and the macrocell that is recorded is the candidate macrocell of described AP when switching.

Described steps A 1 also comprises:

If the macrocell that comprises in the described macrocell tabulation outnumbers defined amount, then the macrocell that comprises in this macrocell tabulation is divided into groups by described defined amount;

Successively the signal strength signal intensity of every group of macrocell is measured, and after the measurement of finishing each group macrocell signal strength signal intensity, selected candidate's macrocell that the strongest macrocell of signal of number up to specification switches as described AP.

When the macrocell in AP sub-district and the geographic area, AP place used different frequencies, described method also comprised:

AP starts the compact model of measuring, and carries out described steps A 1 afterwards.

AP described in the described steps A 2 is identical with measuring process in the described steps A 1 to the measuring process of the signal strength signal intensity of described candidate's macrocell by UE.

Described method also comprises: describedly switch to blind switching.

The apparatus for initiating that the present invention also provides a kind of sub-district to switch comprises:

The measurement result receiver module, be arranged at AP, be used to receive the measurement result of offering on the UE, write down the identity information and the corresponding signal strength signal intensity of each macrocell that exists in this measured geographic area, AP place, and measurement result is offered target macro sub-district determination module;

Target macro sub-district determination module is arranged at AP, the target macro sub-district that the strongest macrocell of measurement result select-out signal intensity that is used for providing according to the measurement result receiver module switches as described AP;

Target macro cell information sending module is arranged at AP, and the macro cell message that is used for being selected by described target macro sub-district determination module is handed down to UE.

Described device also comprises:

Measuring object is provided with module, is arranged at AP, is used for storing the identity information of each macrocell that this geographic area, AP place comprises, and forms the macrocell tabulation by described each macrocell identity information, and this macrocell tabulation is offered measuring object issues module;

Measuring object issues module, is arranged at AP, and the macrocell tabulation that is used for needs are measured sends to UE.

Described device also comprises:

Start compact model order sending module, be arranged at AP, be used for sending the compact model order that starts measurement to UE.

Described device also comprises:

With the frequency judge module, be arranged at AP, be used for judging according to data configuration whether the macrocell of the macrocell tabulation that AP sub-district and described needs are measured is to penetrate with taking place frequently, if, the described macrocell tabulation that need measure is offered measuring object issue module, and trigger measuring object and issue module, otherwise, trigger and start compact model order sending module and measuring object issues module.

The responding device that the present invention also provides a kind of sub-district to switch is characterized in that, comprising:

Measurement module is arranged at UE, and the signal strength signal intensity that is used for successively each macrocell that the geographic area, AP place to the UE correspondence exists is measured, and measurement result is offered the measurement result reporting module;

The measurement result reporting module is arranged at UE, is used for measurement result is reported the AP of described UE correspondence;

Target macro cell information receiver module is arranged at UE, is used to receive the described target macro cell information that described AP sends, and this target macro cell information is offered handover module;

Handover module is arranged at UE, is used for the business of described UE is switched to the target macro sub-district that described AP sends from AP sub-district, place.

Described device also comprises:

The measuring object receiver module is arranged at UE, is used for receiving the macrocell tabulation that needs that each macrocell identity information that the geographic area, AP place by the UE correspondence exists forms are measured, and preserves this macrocell tabulation, triggers measurement module afterwards.

Described device also comprises:

The signal strength signal intensity monitoring modular is arranged at UE, is used for monitoring the signal strength signal intensity of UE position, AP sub-district, and at this signal strength weakening when the predefined threshold value, trigger handover module.

Described device also comprises:

Start the compact model module, be arranged at UE, be used for after receiving the order of startup compact model, starting the compact model of measuring, trigger measurement module afterwards.

The technical scheme that is provided by the invention described above as seen, realization of the present invention can effectively reduce the difficulty of data configuration, promptly when grand covering changes owing to the network optimization, AP is by measuring in advance, automatically adjust the target macro sub-district of switching, and need not to change the related data configuration of AP, save human cost.The present invention determines the blind switching target macrocell by the measurement in advance of AP, when the AP signal is reduced to the threshold value of setting, in time triggers blind switching, guarantees the connectivity and the service quality of success rate for switching and customer service.Simultaneously, when the present invention uses the alien frequencies emission in the AP sub-district with relevant macrocell, when signal quality is better in the AP subdistrict position, just starting compact model measures relevant macrocell signal strength signal intensity, because the number of users of described AP is less relatively, therefore, under compact model, the minimizing of measuring the AP cell capacity that causes can not bring influence to the operate as normal of described AP.

Description of drawings

Fig. 1 is the group network topological structure schematic diagram of AP-AG in the UMTS system;

Fig. 2 is that the position of AP sub-district and macrocell concerns schematic diagram;

Fig. 3 be the concrete AP sub-district of implementing to provide of the present invention when using identical frequency with macrocell AP to the measurement flow chart of corresponding macrocell signal;

Fig. 4 when to be that the present invention is concrete implement the AP sub-district that provides with macrocell use different frequent points AP to the measurement flow chart of corresponding macrocell signal;

Fig. 5 is the interacting message schematic diagram of AP sub-district when the macrocell of correspondence switches that the concrete enforcement of the present invention provides;

Fig. 6 is the apparatus for initiating schematic diagram that switch the sub-district in the concrete UMTS system that implements to provide of the present invention;

Fig. 7 is the responding device schematic diagram that switch the sub-district in the concrete UMTS system that implements to provide of the present invention.

Embodiment

The present invention to the effect that UE sets up professionally at AP, described AP measures the signal strength signal intensity of each macrocell of existing in this geographic area, AP place by UE, and the macrocell of selecting the to meet the demands target macro sub-district of switching as this AP; When the on-site AP signal strength signal intensity of this UE is lower than the threshold value that sets in advance, the business of this UE connected switches to described target macro sub-district from this AP sub-district.

The present invention at first need be when AP opens an account, and the use geographical address of this AP that provides according to the user is selected a band of position corresponding with this AP in the maintenance system of AG.All macrocells that this band of position that will be selected by AG comprises form the macrocell that needs to measure by these all macrocell identity informations and tabulate, and this tabulation is sent to this AP, are preserved by described AP.Wherein, described macrocell identity information comprises the scrambling code information of each macrocell, described scrambling code information is used for distinguishing the macrocell of its geographic area, place by AP, therefore, if in the geographic area at AP place, there is the identical macrocell of two or more scramblers, this AP carries out possibly can't correctly selecting suitable Target cell when signal switches at UE equipment so, and may cause handoff failure.Therefore, need when disposing early stage, be that a macrocell in the geographic area is provided with mutually different scrambler.

When networking, the described macrocell list information that in maintenance console, comprises in the information of configuration geographic area, AP place and this zone.Described geographic area is relative AP position.Operator is at the networking initial stage, macrocell is finished planning after, define the geographic area in a city more as required, as have an area of 5 kilometers etc.Comprise one or more macrocells in each geographic area, that is, the AP place comprises one or more macrocells in the geographic area.As seen, the single geographic area in city is big more, and then the geographic area number that comprises of this city is just few more, and therefore when AP opened an account, the staff who is responsible for opening an account is just easy more to determine which geographic area this AP belongs to.

Specify AP measures the macrocell signal strength signal intensity by UE detailed process below.

AP a kind ofly all uses identical frequency for the AP sub-district with the macrocell that needs to measure to the measurement of macrocell signal strength signal intensity in two kinds of situation, uses the common frequency measurement method to obtain AP region adjacent macro cell message at this moment; A kind of is that different frequencies is used with macrocell in the AP sub-district, needs to start earlier compact model this moment, measures afterwards and obtains relevant macro cell message.

3 AP when specifying AP sub-district among the present invention and using identical frequency with the macrocell that needs to measure are to the measuring process of corresponding macrocell signal at first in conjunction with the accompanying drawings.

After step 31, RRC (Radio Resource control connection) set up and finish, AP was to UE sending measuring control messages Measurement Control;

Comprise the macrocell tabulation that needs are measured in the described measurement control messages.

Step 32, UE measure the macrocell of listing in this message after receiving described measurement control messages successively;

Step 33, UE connect by RRC, and the measurement result of macrocell signal strength signal intensity is reported described AP by measurement report message Measurement Report;

The identity information of the macrocell that step 34, described AP tracer signal intensity are non-vanishing and corresponding signal strength signal intensity.

AP is to the measuring process of corresponding macrocell signal when specifying below in conjunction with accompanying drawing 4 that different frequent points is used in AP sub-district and macrocell among the present invention.

After step 41, RAB (RAB) set up and finish, AP used and measures control messages startup compact model, and issued the tabulation of different-frequency measure sub-district according to the configuration macrocell;

At this moment, even the signal of AP is still fine, AP also needs to use the measurement control messages to start compact model.The user near AP in, signal quality is good, it is little to the influence of customer service to start compact model and measuring process.Because the number of users of AP seldom, the cell capacity that compact model brings reduces can not bring influence to the work of AP.

Step 42 to step 45 with described step 31 to step 34;

Step 45, closes compression pattern.

Measured macrocell number is no more than 32 in the above-mentioned measuring process, and this is determined by the 3GPP agreement.After above-mentioned measuring process was finished, described AP can select the target macro sub-district of the strongest macrocell of signal as its switching from measurement result.And when the on-site AP signal strength signal intensity of this UE is lower than the threshold value that sets in advance, the business of this UE connected switches to described target macro sub-district from this AP sub-district.In addition, among the present invention, the described target macro sub-district that relates to during owing to switching was determined before switching, and therefore switched to blind switching.

Usually, the number of the macrocell in geographic area can be greater than 32, therefore need earlier macrocell with described configuration to be one group and divide into groups, afterwards each group macrocell is measured successively with 32, measuring process with above-mentioned step 31 to step 34 or step 41 to step 45.After the macrocell measurement of whole described configurations was finished, AP just can obtain the identity information and the corresponding signal strength information of all macrocells that go on record in measuring process.AP selects several the strongest macrocells of signal as candidate's macrocell according to the result of record, and afterwards, AP sends to UE with candidate's macro cell message again, is finished next time by UE and measures.Described measuring process next time also can be divided into two kinds of situations: a kind ofly all use identical frequency for the AP sub-district with macrocell, a kind of is the situation that AP sub-district and macrocell use different frequencies, identical to step 45 to step 34 or step 41 with described step 31.The purpose of Ce Lianging is exactly in order to select a strongest macrocell of signal in candidate's macrocell, the target macro sub-district that the macrocell that this signal is the strongest switches as described AP next time.Wherein, candidate's macrocell number should be no more than 32, so that can disposablely finish next step surveying work, promptly Ci Shi measuring process can be carried out in same measurement control messages, and measures after need not candidate's macrocell to be divided into groups again again.

In concrete enforcement, when the user set up business for the first time in AP, AP promptly measured for the first time to the macrocell signal in its geographic area, determines candidate's macrocell; And when the UE in this AP sub-district sets up call business at every turn later on, all in advance candidate's macrocell is measured, from candidate's macrocell, select the blind switching target macrocell, so just can be at macrocell because the network optimization, when its coverage changes, do not influence of the switching of AP sub-district, thereby improve UE from the success rate for switching of AP sub-district to macrocell to suitable macrocell.

After above-mentioned blind switching target macrocell was determined, the present invention monitored the wireless signal that UE receives.When the user keeps the business of its foundation to leave the AP sub-district at place, when UE position signal strength signal intensity is lower than the threshold value of setting in the AP sub-district, trigger blind switching, in time customer service is switched to the target macro sub-district from the AP sub-district, guarantee the connectivity of success rate for switching and customer service.

Because there is the business in PS and two territories of CS simultaneously in UE, therefore when switching, UE moves simultaneously in the service needed in these two territories.For keeping with normal process is consistent at present the mode that the transmission of migration related news still adopts PS territory and CS territory to send respectively among the present invention as far as possible.And, for embodying the simultaneity of the interacting message when the AP sub-district switches to corresponding macrocell of UE business in these two territories, below in conjunction with accompanying drawing 5, adopt parallel explanation mode that the signaling process separately in these two territories is explained, wherein, adopt the step of " 5P " sequence number corresponding to the signaling process in the PS territory; The step that adopts " 5C " sequence number is corresponding to the signaling process in the CS territory.

Step 5P1, AP send the requirement migration message Relocation Required of PS territory business to AG with APAP (AP application protocol) massage pattern;

Step 5C1, AP send the requirement migration message Relocation Required of CS territory business to AG with the APAP massage pattern;

Step 5P2, described AG send migration request message GTPC Relocation Request to SGSN (Serving GPRS Support Node);

Step 5C2, described AG send migration request message GTPC Relocation Request to MSC;

The described migration request message that step 5P3, described SGSN will receive sends to RNC (radio network controller), requires RNC to carry out migration and prepares, and promptly prepares the migration resource requirement;

Step 5C3, described MSC send to RNC with the migration request message that receives, and require RNC to carry out migration and prepare, and promptly prepare the migration resource requirement;

Step 5P4, described RNC set up RL (Radio Link) and connect after receiving described migration request message;

Step 5C4, described RNC set up RL and connect after receiving described migration request message;

Step 5P5, described RNC send migration request response message Relocation Request Acknowledge with the RANAP massage pattern to SGSN after having set up the RL connection, the required resource of notice SGSN migration is ready to;

Step 5C5, described RNC send migration request response message Relocation Request Acknowledge with the RANAP massage pattern to MSC after having set up the RL connection, the required resource of notice MSC migration is ready to;

Step 5P6, described SGSN send migration response message GTPC RelocationResponse to AG;

Step 5C6, described MSC send migration response message GTPC Relocation Response to AG;

Step 5P7, described AG send migration command messages Relocation Command with the APAP massage pattern to described AP, and notice AP can move;

Step 5C7, described AG send migration command messages Relocation Command with the APAP massage pattern to described AP, and notice AP can move;

Step 5P8, AP send RB (radio bearer) by the RRC connection to UE and reconfigure message RBReconfiguration;

Step 5C8, AP send RB by the RRC connection to UE and reconfigure message RBReconfiguration;

After step 5P9, UE reconfigure RB, return RB to RNC and reconfigure and finish message RRCRB Recfg Complete;

After step 5C9, UE reconfigure RB, return RB to RNC and reconfigure and finish message RRCRB Recfg Complete;

Step 5P10, RNC receive described RB reconfigure finish message after, finish message Relocation Complete with the RANAP massage pattern to the SGSN remigration, the notice SGSN move successfully;

Step 5C10, RNC receive described RB reconfigure finish message after, finish message RANAP Relocation Complete to the MSC remigration, the notice SGSN move successfully;

The described migration that step 5P11, SGSN will receive is finished forwards and is given AG;

The described migration that step 5C11, MSC will receive is finished forwards and is given AG;

Step 5P12, AG send IUP release command message APAP LUP Release Command receiving after described migration finishes message to AP, and the IUP that notice AP discharges its PS territory connects;

Step 5C12, AG send IUP release command message APAP LUP Release Command receiving after described migration finishes message to AP, and the IUP that notice AP discharges its CS territory connects;

In the described step 520, AG only is responsible for that forwards is finished in described migration and gives AP, does not do the buffer memory and the wait of this message, reduces the load of the amount of managing business of AG and the internal memory that takies with this, do the processing that discharges the IUP resource by AP, and should discharge the processing compatibility of handling with existing RNC.

Step 5P13, AP discharge the IUP resource in its PS territory after receiving described IUP release command message;

Step 5C13, AP discharge the IUP resource in its CS territory after receiving described IUP release command message;

Step 5P14, afterwards, AP sends to AG with the APAP massage pattern with IUP resource Release complete IupRelease Complete, and process finishes.

Step 5C14, afterwards, AP sends to AG with the APAP massage pattern with IUP resource Release complete IupRelease Complete, and process finishes.

The apparatus for initiating that the present invention also provides a kind of sub-district as shown in Figure 6 to switch specifically comprises following functional module:

(1) measuring object is provided with module

Be arranged at AP, be used for storing the identity information of each macrocell that this geographic area, AP place comprises, form the macrocell tabulation, and this tabulation is offered measuring object issue module by described each macrocell identity information.

(2) measuring object issues module

Be arranged at AP, the macrocell tabulation that is used for needs are measured sends to UE.

(3) with the frequency judge module

Be arranged at AP, be used for judging according to data configuration whether the macrocell of the macrocell tabulation that AP sub-district and described needs are measured is to penetrate with taking place frequently, if, the described macrocell tabulation that need measure is offered measuring object issue module, and the triggering measuring object issues module, otherwise, trigger startup compact model order sending module and measuring object and issue module.

(4) start compact model order sending module

Be arranged at AP, be used for sending the compact model order that starts measurement to UE.

(5) measurement result receiver module

Be arranged at AP, be used to receive the measurement result of offering on the UE, write down measured macrocell identity information and corresponding signal strength signal intensity, and measurement result is offered target macro sub-district determination module;

(6) target macro sub-district determination module

Be arranged at AP, the target macro sub-district that the strongest macrocell of measurement result select-out signal intensity that is used for providing according to the measurement result receiver module switches as described AP.

(7) target macro cell information sending module

Be arranged at AP, the macro cell message that is used for being selected by described target macro sub-district determination module is handed down to UE.

The present invention also provides a kind of responding device of sub-district switching as shown in Figure 7, specifically comprises the module of following function:

(8) measuring object receiver module

Be arranged at UE, be used to receive the macrocell that needs that the macrocell identity information measured by needs forms measure and tabulate, and preserve this tabulation, trigger measurement module afterwards.

(9) start the compact model module

Be arranged at UE, be used for after receiving the order of startup compact model, starting the compact model of measuring, trigger the UE measurement module afterwards.

(10) measurement module

Be arranged at UE, the signal strength signal intensity that is used for successively each macrocell that needs are measured is measured, and measurement result is offered the measurement result reporting module.

(11) measurement result reporting module

Be arranged at UE, be used for measurement result is reported corresponding AP.

(12) target macro cell information receiver module

Be used to receive the described target macro cell information that described AP sends, and this information is offered handover module;

(13) signal strength signal intensity monitoring modular

Be arranged at UE, be used for monitoring the signal strength signal intensity of UE position, AP sub-district, and at this signal strength weakening when the predefined threshold value, trigger handover module.

(14) handover module

Be arranged at UE, be used for described UE business is switched to the target macro sub-district that described AP switches from AP sub-district, place.

In sum, it is that AP disposes macrocell in the geographic area at AP place that the present invention only needs operator, and AP is by measuring the target macro sub-district of determining that the AP sub-district is switched in advance afterwards.As seen, realization of the present invention can effectively reduce the difficulty of data configuration, promptly when grand covering changes owing to the network optimization, AP is by measuring in advance, automatically adjust the blind switching target macrocell, and need not to change the related data configuration of AP, save human cost.Simultaneously, the present invention determines the blind switching target macrocell by the measurement in advance of AP, when the AP signal is reduced to the threshold value of setting, in time triggers blind switching, guarantees the connectivity and the service quality of success rate for switching and customer service.Simultaneously, when the present invention uses the alien frequencies emission in the AP sub-district with relevant macrocell, when signal quality is better in the AP subdistrict position, just starting compact model measures relevant macrocell signal strength signal intensity, because the number of users of described AP is less relatively, therefore, under compact model, the minimizing of measuring the AP cell capacity that brings can not bring influence to the operate as normal of described AP.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.

Claims

1. A cell switching method, characterized in that, comprising:

A. The user equipment UE establishes services at the access point AP. The AP measures the signal strength of each macro cell existing in the geographical area where the AP is located through the UE, and selects the macro cell with the strongest signal strength as the AP handover Target macro cell;

B. When the signal strength of the AP where the UE is located is lower than the preset threshold value, switch the service connection of the UE from the AP cell corresponding to the AP to the target macro cell.

2. The method according to claim 1, characterized in that the step A specifically comprises:

A1. When the user equipment UE establishes a service at the access point AP for the first time, the AP measures the signal strength of each macro cell existing in the geographical area where the AP is located through the UE, and selects a predetermined number of macro cells with the strongest signal as the The candidate macro cell when the AP is handed over;

A2. When the UE establishes a service each time, the AP measures the signal strength of the candidate macro cells through the UE, and selects the macro cell with the strongest signal as the target macro cell to be handed over by the AP.

3. The method according to claim 2, characterized in that, before performing step A1, comprising:

In advance, according to the geographical area where the AP is deployed, select the corresponding geographical area of the AP in the AG maintenance system of the corresponding access gateway, and the AG will store all the information contained in the geographical area corresponding to the AP in the AG maintenance system. The macro cell identity information forms the macro cell list of the geographical area corresponding to the AP in the AG maintenance system, and sends the macro cell list to the AP for storage by the AP. The identity information includes scrambling information, and each macro cell The cell scrambling codes are different from each other.

4. The method according to claim 3, characterized in that the step A1 specifically comprises:

A11. The AP establishes a connection with the UE and sends the macro cell list to the UE, and the UE measures the signal strength of each macro cell in the macro cell list in turn, and reports the measurement result to the the AP, and perform step A12;

A12. After the AP receives the measurement result of the UE, it records the identity information of the macro cell whose signal strength is not zero and the corresponding signal strength information in the measurement result, and the recorded macro cell is the one when the AP performs handover Candidate macro cell.

5. The method according to claim 3, characterized in that said step A1 further comprises:

If the number of macro cells included in the macro cell list exceeds a prescribed number, grouping the macro cells included in the macro cell list according to the prescribed number;

The signal strength of each group of macro cells is measured in turn, and after the measurement of the signal strength of each group of macro cells is completed, the macro cells with the strongest signal meeting the specified number are selected as the candidate macro cells for the AP to switch over.

6. The method according to claim 3, wherein when the AP cell and the macro cell in the geographical area where the AP is located use different frequency points, the method further comprises:

The AP starts the compressed mode of measurement, and then executes the step A1.

7. The method of claim 2, comprising:

The process of measuring the signal strength of the candidate macro cell by the AP through the UE in the step A2 is the same as the measurement process in the step A1.

8. The method according to any one of claims 1 to 7, wherein the handover is a blind handover.

9. A device for initiating cell handover, comprising:

The measurement result receiving module, set in the AP, is used to receive the measurement result reported by the UE, record the identity information and corresponding signal strength of each macro cell existing in the geographical area where the AP is located, and provide the measurement result to the target macro cell determination module;

The target macro cell determination module is arranged on the AP, and is used to select the macro cell with the strongest signal strength as the target macro cell for the AP handover according to the measurement results provided by the measurement result receiving module;

The target macro cell information delivery module is set on the AP and is used to deliver the macro cell information selected by the target macro cell determination module to the UE.

10. The device according to claim 9, further comprising:

The measurement object setting module is set on the AP, and is used to store the identity information of each macro cell included in the geographical area where the AP is located, form a macro cell list from the identity information of each macro cell, and provide the macro cell list to the measurement object Issue the module;

The measurement object sending module is set on the AP and is used to send the list of macro cells to be measured to the UE.

11. The device according to claim 10, further comprising:

The command sending module for starting the compressed mode is set in the AP, and is used for sending the compressed mode command for starting the measurement to the UE.

12. The device according to claim 11, further comprising:

The same-frequency judging module, set on the AP, is used to judge whether the AP cell and the macro cells in the list of macro cells to be measured are transmitted at the same frequency according to the data configuration, and if so, provide the list of macro cells to be measured to the measurement The object delivery module, and trigger the measurement object delivery module, otherwise, trigger the compressed mode command sending module and the measurement object delivery module.

13. A response device for cell handover, comprising:

The measurement module is set in the UE, and is used to sequentially measure the signal strength of each macro cell existing in the geographical area where the AP corresponding to the UE is located, and provide the measurement results to the measurement result reporting module;

The measurement result reporting module is set in the UE and is used to report the measurement result to the AP corresponding to the UE;

A target macro cell information receiving module, configured in the UE, for receiving the target macro cell information sent by the AP, and providing the target macro cell information to the handover module;

The handover module is set in the UE, and is used to hand over the service of the UE from the AP cell where the UE is located to the target macro cell sent by the AP.

14. The device according to claim 13, further comprising:

The measurement object receiving module is set in the UE, and is used to receive a list of macro cells to be measured formed by the identity information of each macro cell in the geographical area where the AP corresponding to the UE is located, and save the list of macro cells, and then trigger the measurement module.

15. The device according to claim 13, further comprising:

The signal strength monitoring module is set on the UE, and is used to monitor the signal strength of the UE's location in the AP cell, and trigger the switching module when the signal strength weakens to a preset threshold value.

16. The device according to claim 13, further comprising:

The module for starting the compressed mode is set in the UE, and is used for starting the compressed mode for measurement after receiving the command for starting the compressed mode, and then triggering the measurement module.